What Is a Partition Action in California? How Co-Owners Force a Division or Sale of Property

What Is a Partition Action in California?

A partition action is a lawsuit in which a co-owner of property asks the court to end the co-ownership — either by physically dividing the property among the owners ("partition in kind") or by ordering it sold and dividing the proceeds according to each owner's interest ("partition by sale"). California's partition law is found in the Code of Civil Procedure, beginning at Section 872.010. For co-owners who share concurrent interests, such as tenants in common or joint tenants, partition is a matter of right: under Code of Civil Procedure Section 872.710(b), the court must allow it unless the right has been barred by a valid waiver.

Partition disputes arise whenever people who own property together can no longer agree on what to do with it. Siblings who inherit a family home, unmarried partners who bought a house together, friends or relatives who co-invested in a rental property, and business associates who hold land in their own names all face the same problem: one owner wants to sell or cash out, and another wants to keep the property or cannot afford to buy the others out. Partition gives any co-owner a way to break that deadlock without the agreement of the others. These cases are a common part of real estate litigation.

Who Can File a Partition Action?

Under Code of Civil Procedure Section 872.210, a partition action may be commenced by a co-owner of personal property, or by an owner of an estate of inheritance, an estate for life, or an estate for years in real property, where the property is owned by several persons concurrently or in successive estates. In practical terms, any co-owner of real estate — no matter how small the ownership share — can generally bring the action.

There is one important exception. Section 872.210(b) provides that an action between spouses or putative spouses for partition of their community or quasi-community property, or their quasi-marital interest in property, may not be brought under the partition statutes. Those disputes are handled in family court instead. For other co-owners, including unmarried partners and family members, partition is available.

The rule is also different for successive estates, such as a life estate followed by a remainder. Under Section 872.710(c), partition of successive estates is allowed only if it is in the best interest of all the parties, and the court weighs factors such as the burden of taxes and repairs, changes in the property's character, and the intent of the person who created the estates.

How Do You File a Partition Action in California?

A partition case starts with a complaint filed in the superior court. Under Code of Civil Procedure Section 872.230, the complaint must set forth:

1. A description of the property, including both its legal description and its street address or common designation for real property.
2. All interests the plaintiff has or claims in the property.
3. All interests of record, or actually known to the plaintiff, that other persons have or claim and that will be materially affected by the action.
4. The estate as to which partition is sought, and a prayer for partition of the interests in it.
5. Where the plaintiff seeks a sale, the facts that justify that relief.

Immediately upon filing, the plaintiff must also record a notice of pendency of action (lis pendens) with the county recorder in each county where the real property is located, as required by Code of Civil Procedure Section 872.250. From the time the notice is recorded, anyone dealing with the property is deemed to have notice of the lawsuit. If the notice is not recorded, the court must order it recorded and stay the action until it is.

At trial, the court first determines whether the plaintiff has the right to partition and what each party's interest is. The court then decides the manner of partition, and appoints a referee under Code of Civil Procedure Section 873.010 to divide or sell the property as ordered. The court can instruct the referee, set the referee's compensation, require accountings, and remove or replace the referee if necessary.

Partition in Kind vs. Partition by Sale

The starting point under Code of Civil Procedure Section 872.810 is physical division: the court shall order that the property be divided among the parties in accordance with their interests. But Section 872.820 requires the court to order a sale instead, with the proceeds divided according to each party's interest, when either the parties agree to a sale, or the court determines that sale and division of the proceeds would be more equitable than division of the property.

For most single-family homes and condominiums, dividing the property physically is not realistic — you cannot split one house into separately usable halves — so partition by sale is the most common outcome. Partition in kind is more often considered for larger parcels of land that can be subdivided into fairly equivalent pieces.

The court also has broad equitable power to settle the financial accounts between the co-owners. Under Code of Civil Procedure Section 872.140, the court may, in all cases, order allowance, accounting, contribution, or other compensatory adjustment among the parties according to the principles of equity. This is where disputes over who paid the mortgage, property taxes, insurance, and repairs, or who lived in or rented out the property, are typically resolved.

The Partition of Real Property Act (Effective 2023)

For partition actions filed on or after January 1, 2023, California added a separate set of procedures known as the Partition of Real Property Act, found at Code of Civil Procedure Section 874.311 and the sections that follow. The Act applies to real property held in tenancy in common where there is no agreement in a record binding all the cotenants that governs partition of the property. It is designed to give co-owners who want to keep the property a fair chance to do so. Key features include:

• Court-determined value. Under Section 874.316, unless the cotenants agree on a value or valuation method, the court determines the property's fair market value, ordinarily through an appraisal by a disinterested licensed appraiser, and parties can object before the court sets the value.
• A buyout right. Under Section 874.317, if any cotenant requests partition by sale, the other cotenants have 45 days after the court's notice to elect to buy out the interests of the cotenants who requested the sale, at a price equal to the court-determined value multiplied by each seller's fractional share.
• Factors for deciding in kind vs. sale. Under Section 874.319, the court weighs factors including whether the property can practicably be divided, whether division would materially reduce its value, how long the family has owned it, any cotenant's sentimental attachment, the lawful use being made of the property, and each cotenant's contributions to taxes, insurance, and upkeep — with no single factor dispositive.
• Open-market sale. Under Section 874.320, a court-ordered sale is ordinarily an open-market sale through a licensed real estate broker, at a price no lower than the court-determined value, unless the court finds sealed bids or an auction would be more economically advantageous for the cotenants as a group.

These rules can significantly change the strategy and timeline of a partition case, especially for inherited property, so it is important to determine early whether the Act applies.

Who Pays the Costs of a Partition Action?

Partition is one of the few areas of California law where attorney's fees can be shared among the parties by statute. Under Code of Civil Procedure Section 874.010, the costs of partition include reasonable attorney's fees incurred or paid by a party for the common benefit, the referee's fees and expenses, the compensation of a surveyor or other person employed by the referee, the reasonable cost of a title report, and other expenses the court finds were incurred for the common benefit. Under Section 874.040, the court apportions those costs among the parties in proportion to their interests, or makes another apportionment that is equitable.

The "common benefit" limitation matters. Fees spent bringing about the partition and sale that benefits every owner may be shared, while fees spent on purely adversarial fights between co-owners may not be. How a court treats a particular expense depends on the facts.

How Long Does a Partition Action Take in California?

There is no fixed timeline. The length of a partition case depends on whether the co-owners contest the right to partition or their respective shares, whether the Partition of Real Property Act's appraisal and buyout procedures apply, how complicated the accounting between the owners is, and how quickly the referee or broker can complete a sale. Many partition cases settle once it becomes clear the court will order a sale, because co-owners can often sell the property themselves on better terms than a court-supervised process.

Defenses to a Partition Action

Because partition of concurrent interests is a matter of right, defenses are limited, but they exist. The most significant is waiver: Section 872.710(b) makes partition available unless barred by a valid waiver, so a co-ownership or tenancy-in-common agreement in which the owners gave up the right to partition, or agreed to a buy-sell procedure instead, may block or shape the case. The spousal exclusion in Section 872.210(b) removes community and quasi-community property disputes from the partition statutes. For successive estates, a defendant can argue that partition is not in the best interest of all parties under Section 872.710(c). And many contested partition cases are really fights over the details: each party's percentage of ownership, whether the property should be divided or sold, and what credits or charges belong in the final accounting under Section 872.140.

If you co-own property and the relationship has broken down, the earlier you understand your options, the more control you keep — whether that means negotiating a buyout, agreeing to a voluntary sale, or asking the court to step in. Good records of ownership, payments, and communications are the foundation of every partition case. For more on related property disputes, see our guides to boundary disputes and probate, which often intersect with inherited co-owned property.